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regulation vocabular
Question | Answer |
---|---|
regulation | controls the amount and direction of responses, maintains homeostasis |
stimulus | something that causes a change in the organims which causes a change in the organsism |
neuron | send eletrical and chemical impulses and are transmitted only among the cell memebrane |
impulse | a sudden involuntary urge to do something |
effector | body parts that cause a change in the environement which creates a change in an organism |
Receptors- | specialized structures sensitive to certain types of stimuli |
Response | action resulting from the stimulus |
Neurotransmitters | are brain chemicals that allow transmission of signals from one neuron to another |
Irritability | ability of a cell to respond to its environment |
Dendrites- | hair like structures which receive impulses first |
Cyton (cell body)- | contains the nucleus and other organelles . it is the site of metabolic activity |
Axon- | long thin structures that carries impulses away from cell body to an effector |
Hormones | chemical messengers that are manufactured by the endocrine glands |
Glands- | - organs that secrete substances in and out of the body |
Target cells/tissues/organs- | hormones |
Hypothalamus | releases hormones when information is received from the nervous system |
Hyposecretion | too little hormone is secreted |
Hypersecretion- | too much hormone is secreted |
Feedback mechanism | -one change causes another change |
Reflex | automatic response to a sensory stimulus |
Cerebrum- | is the largest part of the brain and contains memory, , thought, analyzing and the senses |
Cerebellum | means little brain and maintains balance and controls all voluntary and some involuntary activities |
Medulla oblongata- | - lowest part of the brain and controls many involuntary activities |